It seems that the consensus is that 40 PSI is a good minimum to start from. I am surprised to see an even distribution in the poll from 40 PSI.
I expect to see a really big mpg gain from these tires. I currently have 30 x 9.5 bf Goodrich tires at 35 PSI. I will be getting some A/S Michellin tires that are 235/75R15 and I will pump them up to 40 PSI. The nice thing about them is that they are more aerodynamic, 1/4 inch narrower and 29 inches tall
